Facing competition: Neural mechanisms underlying parallel programming of antisaccades and prosaccades.
The antisaccade task is a prominent tool to investigate the response inhibition component of cognitive control. Recent theoretical accounts explain performance in terms of parallel programming of exogenous and endogenous saccades, linked to the horse race metaphor. Previous studies have tested the h...
| Publicado en: | Brain & Cognition Vol. 107; pp. 37 - 48 |
|---|---|
| Autores principales: | , , , , , , |
| Formato: | research Journal Article |
| Publicado: |
Academic Press Inc.
Aug2016
|
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=116907211&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 116907211 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 02782626 88Z jtl: Brain & Cognition issn: 02782626 maglogo: N pubinfo: dt: Aug2016 vid: 107 pid: 735 pub: Academic Press Inc. place: Burlington, Massachusetts artinfo: ui: 116907211 116907211 NLM27363008 116907211 10.1016/j.bandc.2016.05.006 NLM27363008 116907211 ppf: 37 ppct: 11 formats: tig: atl: Facing competition: Neural mechanisms underlying parallel programming of antisaccades and prosaccades. aug: au: Talanow, Tobias Kasparbauer, Anna-Maria Steffens, Maria Meyhöfer, Inga Weber, Bernd Smyrnis, Nikolaos Ettinger, Ulrich affil: Department of Psychology, University of Bonn, Bonn, Germany sug: subj: Magnetic Resonance Imaging Executive Function Cerebral Cortex Physiology Behavior Psychomotor Performance Eye Movements Physiology Male Young Adult Saccades Physiology Eye Movement Measurements Female Adult Human Adult: 19-44 years Male Female ab: The antisaccade task is a prominent tool to investigate the response inhibition component of cognitive control. Recent theoretical accounts explain performance in terms of parallel programming of exogenous and endogenous saccades, linked to the horse race metaphor. Previous studies have tested the hypothesis of competing saccade signals at the behavioral level by selectively slowing the programming of endogenous or exogenous processes e.g. by manipulating the probability of antisaccades in an experimental block. To gain a better understanding of inhibitory control processes in parallel saccade programming, we analyzed task-related eye movements and blood oxygenation level dependent (BOLD) responses obtained using functional magnetic resonance imaging (fMRI) at 3T from 16 healthy participants in a mixed antisaccade and prosaccade task. The frequency of antisaccade trials was manipulated across blocks of high (75%) and low (25%) antisaccade frequency. In blocks with high antisaccade frequency, antisaccade latencies were shorter and error rates lower whilst prosaccade latencies were longer and error rates were higher. At the level of BOLD, activations in the task-related saccade network (left inferior parietal lobe, right inferior parietal sulcus, left precentral gyrus reaching into left middle frontal gyrus and inferior frontal junction) and deactivations in components of the default mode network (bilateral temporal cortex, ventromedial prefrontal cortex) compensated increased cognitive control demands. These findings illustrate context dependent mechanisms underlying the coordination of competing decision signals in volitional gaze control. pubtype: Academic Journal doctype: research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
|---|